Friction draft rigging



R. A, BROCKELSEBY FRICTION DRAFT RIGGING Filed Feb. 18, 1922 mmm 3 Sheets-Sheet LV INVENTOR mwwmmw ATTO NEY Se t 2. 1924.

R. A. BROCKELSBY FRICTION DRAFT RIGGING I 3 Sheets-Sheet 3 Filed Feb. 18 1922 Sept 2 FRICTION DRAFT RIGGING 192? 3 Sheets-Sheet 5 Filed Feb. 18

LCY mm a E .T

Patented Sept. 2,1924.

" UNITED STATES PATENTFQFF l,506,811 ICE.

RALPH A. BROGKELSBY, or CLEVELAND, onto, nssrenoie BY MESNE ASSIGNMENTS, TONATIONAL MALLEABLE AND STEEL CASTINGS COMPANY, or CLEVELAND, 01110,

A CORPORATION OF OHIO.

FRICTION DRAFT RIGGING. A

Application filed February 18, 1922. Serial No. 587,371.

I To all whom it may concern:

Be it known that I, RALPH A. BROCK- ELSBY, a citizen of the United States, resid ing at Cleveland, Cuyahoga County, Ohio, have invented new and useful Improvements in Friction Draft Rigging, of which the followingis a specification, reference being had to the accompanying drawingain which-- I Fig. l is a plan showing the application of my invention to the underframing of a car; F ig. 2 is a section on lines 11-11 of Fig. 1; Fig. 3 is adetail plan ofthe'mechanism partly in Section; Fig. 4 is anele'vation of-a detail of the mechanism partly in section; Fig. 5 is a section on lines V-V of Fig. 4; Fig. 6-is an. elevation of the forward side of the front' follower; Figs. 7 and 8 are elevations, respectively, .of the front and rear. sides of theintermediate follower; and

F i' '9i isa side elevation thereof, I

; ysinvention relates to friction draft rigging for tail bolt couplers and comprises-- the use of a tail bolt in the form'of a cenbase of resistance. This construction is particularly adapted for use in cars in which there is not room for a yoke or draft .links of the ordinarycharacter'. My inven- "tion" also,-comprises the various features which I shall hereinafter describe and claim. Referring to the drawings, indicates the coupler, whichnat its rear end terminates in a pairofparallel, horizontal extensions 2 providing aspace between them for the reception of a for-ward end 3 of the. tail bolt, 'which is in the form of a central friction vmember B. Theforward end 3 of the 'central frictionmem-ber B and the rearward extension'2 of the coupler A are apertured for "the reception of a vertically disposed key or pin 4. The apertures 5 in the rearward extensions 2 of the couplerare elongated and are made of greater width at their forward ends to provide for movement of the tral friction memberv of 'the' draft rigging,

is preferably enlarged to form a broad, flat.

enlarged base. 6, preferably made integral,

which servesas the rear follower and enthe forward end of the central friction member and immediately to the rear of its connection with the coupler is a follower wedge S, which is centrally apertured and through which the forward end 3 of the central friction member B extends. The extensions 2 of the coupler shank have arcshaped rear ends 9, and the follower wedge has similarly rounded seats 10 above and below its central aperture, against which the rounded ends 9 of .the couplerextensions 2 will bear in buffing. The follower wedge 8 also has guide lugs'll which extend forwardly at either side of the forward end 3. of the central friction member so as to ggide the central member when the coupler is pull-' 7 ing at an angle. The central friction member B preferably has outwardly radiating 7 arms 12 forming re-entrant angles therebetween. In each re-entrant angle a friction shoe 13 is seated, upon which bear corre sponding wedging faces 14 of the follower 8. To the rear of the friction shoes 13 is a segmental seat or intermediate two-part follower 15, the forward face of which engages theshoes 13 andthe rear face of which is engaged by a spring 16, which at its rear end bears against the enlarged base 6 of the central friction member. The segmental seat or intermediate follower 15 is made in two U-shapednaarts 15, 15', and, as is shown in Figs. 3, 49nd T, is of a smaller internal diameter than the forward end 3 of the cen tral friction member, which is enlarged and reinforced around the aperture for the pin. 4. Seated in openings in the follower wedge s 8 and base 6 are the bufling columns 17, which prevent further compression of the gear after the safe limit of compression has been reached, and the retaining rods 18 by which the gear is held together and prevented from separating either during shipping or while in use. r 100 In assembling the gear the parts are threaded over the central frictidnmember 4 from the forward end, and the two parts 15, 15 which have an overlapping engagement with each other, are riveted together, as is best shown in Figs. 3 and 4, after being put in-place about the central friction member. When the gear has been assembled, the forward end 3 of thecentral friction memberis attached to the rearward extensions of the I coupler by passing a key 4: through the friction member.

apertures 5 in the cou ler extensions and in the forward end 3 o the central frictionmember B. In bufling, the arc-shaped rear ends 9 of the coupler shank bear" against the seats 10 of thefollower wedge, the rear follower 6 is held against rearward movement by the rear draft lugs 7, and "the rearward movement of the wedge 8 under impulsefrom the coupler is resisted by the frictional engagement of the shoes against-the central In draft, the coupler shank A pulls the central frictionmember B forwardly, through its key connection ward movement by fected by pressure with that member, and the pressure is transmitted through the base 6 to the spring,'the segmental seat 15, 15 and thence through the friction shoes to the central friction 19. Release of t room for making connections at the sides of.

the gear. This construction provides a. ear of very rugged type, which is capable 0 extremelyheavy service, since the friction mechanism is designed to ,withstand extremely heavy pressures. I

The terms and expressions which I have employed are used as terms of description and not of limitation, and I have no intention, in the'use of such terms and eizpressions, ofexcluding any'mechanical' equivalents of'the features shown and described, or portions thereof, but recognize that various structural It is alsov to beunderstood'that in using the term wedge"follower in the appended claims I do notintend to define the member referred tomerely as a follower, but rather as a member having wedging surfaces. v What I claim is-a;

1. A friction draft gear comprising a I central friction member having a forward projection slotted for connection with apertured rearwardly extending arms of a coupler, the p-ro ectiOnand arms being con-' nected by a transversely extending key' said 'central friction member having'a broad, flat base of resistance and friction shoes arranged in re-entrantangles of said central friction member, spring mechanism between said shoes and the said base and a follower wedge threaded over the forward end of said central friction member engaging said and engaging said shoes, .follower having an aperture 'therethrough' modifications are. possible, within the scopeof the invention claimed.

enlargements at its and longitudinally extending friction faces,

nee sear shoes and arranged to talie up the buffing I stresses from the rear end of the coupler.

2. A friction draft gear comprising a central friction member having its forward end connected to the rear end of a coupler by a slot and projection engagement and'a transversely extending key, thecentral friction member having assembled upon it friction'shoes, a spring between said shoes and a portion of the centralfriction member b and arranged to resist the travel of the shoes along said member and a follower wedge, said wedge being arranged to-transmit buifing stresses directly from coupler to the frictional elements.

3. A friction draft gear central friction member having its forward end connected to the rear end of a coupler, said memberhaving in its sides ire-entrant angles, friction shoes arranged. in said angles, a wedgefollower engaging said shoes comprising a and havinga guiding bearing upon the cen-' tral friction member when the coupler is under draft, and a compression spri between the rear end of the member an the shoes.

4. A friction central friction member connected to the rear end of a coupler, said member-having longitudinally extending friction faces and,

draft gear comprising a.

enlargements at its-forward and rear ends,

friction shoes engaging said friction faces, a wedge follower and an intermediate follower surrounding said friction .member said intermediate of a size insu'fiicient to pass over the for? ward end of said friction member, and spring mechanism having bearings on the intermediate member and on the enlarge .ment at the rear end of the central member.

'5. A friction draft gear comprising a eentral friction member having its forward end arranged to be connected to. the. rear end of a coupler, the said member having forward and rear ends id friction faces being engaged by friction shoes, a wedge follower bearingupon said friction shoes capable of being threaded v over the forward end of the frictionmemand a two-part intermediate followerbearing on the friction shoes, the said also intermediate follower being incapable of being threaded over the forward end of saidfriction member, and a spring between said monomfriction shoes and central friction member, the central friction member at its forward end being flexibly connected to a coupler shank and being guided laterally by said Wedge follower.

7. A friction draft geain comprising a central friction member, fiiriction shoes mounte& upon said central friction member, a "wedge follower for forcing'gsaid shoes into v'10 frictional engagement with said central friction member, and a spring between said friction shoes and central friction member, the central friction member having an extension projecting through said wedge follower and having a flexible pulling connection with a coupler shank, said connection permitting relative movement of coupler and central member in buffing.

RALPH A. nnocnnnsnr; 

